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Add progress hook granularity in lossless

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A WebPPicture instance is necessary to call WebPReportProgress() which
sets WebPPicture::error_code so as well use WebPEncodingSetError() to
record errors too, instead of functions returning a WebPEncodingError.
However there must be one WebPPicture instance per thread, with error
codes merged at sync time. A mutex could simplify that but it is not
the objective of this change.

https://groups.google.com/a/webmproject.org/g/webp-discuss/c/yOiP8APubgc/m/vCTvxl6ODgAJ

Change-Id: Ia1a8f9d1199202e1c88484ce719b0180a80447ce
This commit is contained in:
Yannis Guyon
2022-02-02 14:39:21 +01:00
parent 26139c7398
commit ec178f2c7f
9 changed files with 414 additions and 284 deletions
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12
src/enc/histogram_enc.h
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@@ -105,14 +105,16 @@ static WEBP_INLINE int VP8LHistogramNumCodes(int palette_code_bits) {
((palette_code_bits > 0) ? (1 << palette_code_bits) : 0);
}
// Builds the histogram image.
// Builds the histogram image. pic and percent are for progress.
// Returns false in case of error (stored in pic->error_code).
int VP8LGetHistoImageSymbols(int xsize, int ysize,
const VP8LBackwardRefs* const refs,
int quality, int low_effort,
int histogram_bits, int cache_bits,
const VP8LBackwardRefs* const refs, int quality,
int low_effort, int histogram_bits, int cache_bits,
VP8LHistogramSet* const image_histo,
VP8LHistogram* const tmp_histo,
uint16_t* const histogram_symbols);
uint16_t* const histogram_symbols,
const WebPPicture* const pic, int percent_range,
int* const percent);
// Returns the entropy for the symbols in the input array.
double VP8LBitsEntropy(const uint32_t* const array, int n);